Is my watch been opened?

[skywyy]

hello my dear friends
I have a Omega SM 300m chron dive. I looked at the back and suspect that my watch has been opened before. How do I know my watch is been opened or not? Love to hear all your doctrine.

[Joe K.]

There is really no way to know for certain. Some watches have a little colored dot that is supposed to come off if the watch is opened. Problem is not all Omegas have this and it also can come off with regular wear. However, if there are tool marks on the case back then you should assume it was opened.

hello my dear friends
I have a Omega SM 300m chron dive. I looked at the back and suspect that my watch has been opened before. How do I know my watch is been opened or not? Love to hear all your doctrine.

[mrsnak]

Scratches on the caseback holes where a tool might have slipped would be a good indication. Cases don't always line up when screwed shut from the factory, either.